PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Palaearctomys montanus

Osteichthyes - Rodentia - Sciuridae

Taxonomy

Palaearctomys montanus was named by Douglass (1903) [genotype]. Its type specimen is CM 740, a partial skeleton ( skull without the right zygomatic arch, parts of the cranium, and the cheek teeth; nearly complete right and left mandibular rami with worn cheek teeth; and pa), and it is a 3D body fossil.

Synonyms

Palaearctomys macrorhinus was named by Douglass (1903). Its type specimen is CM 733, a partial skull (A skull without the left zygomatic arch and the occipital region; upper incisor, right P4, left M1, M2 and M3 present), and it is a 3D body fossil.

It was synonymized subjectively with Palaearctomys montanus by Black (1963), Tabrum and Nichols (2001).

Synonymy list

Year	Name and author
1903	Palaearctomys macrorhinus Douglass
1903	Palaearctomys montanus Douglass
1903	Palaearctomys macrorhinus Douglass p. 184 figs. 24, 25
1945	Palaearctomys macrorhinus Bryant p. 359 figs. Pl. 8, figs. a, b
1945	Palaearctomys montanus Bryant p. 359
1963	Palaearctomys montanus Black p. 150

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
class	Osteichthyes
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
subclass	Synapsida
—	Therapsida	()
infraorder	Cynodontia	()

Rank	Name	Author
—	Mammaliamorpha
—	Mammaliaformes
class	Mammalia
—	Cladotheria
—	Zatheria
subclass	Tribosphenida	()
subclass	Theria
—	Eutheria	()
—	Placentalia
—	Boreoeutheria
—	Euarchontoglires	Murphy et al. 2001
—	Gliriformes	Wyss and Meng 1996
—	Glires	()
—	Simplicidentata	()
order	Rodentia
superfamily	Sciuroidea
family	Sciuridae
tribe	Marmotini
genus	Palaearctomys
species	montanus

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

†Palaearctomys montanus Douglass 1903

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Invalid names: Palaearctomys macrorhinus Douglass 1903 [synonym]

Diagnosis

Reference	Diagnosis
M. D. Bryant 1945 (Palaearctomys macrorhinus)	Skull robust; smaller and relatively stouter than that of P. montanus and Marmota monax. Rostrum particularly massive; zygomatic arches markedly convex laterally; longitudinal ridges on upper incisor fine; upper incisor short and heavy; upper diastema long; cheek teeth small.
M. D. Bryant 1945	Skull larger and relatively slenderer than that of P. macrorhinus. Zygomatic arches slightly convex laterally. Longitudinal ridges on upper incisor coarse; upper incisor relatively narrower and longer than in P. macrorhinus. Symphyseal suture of jaw extensive

Measurements

No measurements are available

Composition:

phosphaticsubp

Environment:

terrestrialsubc

Locomotion:

actively mobilec

Life habit:

scansorialf

Diet:

granivoref

Diet 2:

frugivoref

Reproduction:

viviparoussubc

Created:

2005-06-08 10:11:09

Modified:

2005-08-26 18:04:24

Source: f = family, subc = subclass, c = class, subp = subphylum

References: Ji et al. 2002, Nowak 1991, Lillegraven 1979, Hendy et al. 2009, Carroll 1988

Collections

No collection or age range data are available